Add a per-game option to delete the shader cache that has been created during the emulation

app/src/main/java/org/stratoemu/strato/AppDialog.kt

@@ -25,8 +25,10 @@ import org.stratoemu.strato.data.AppItemTag
 import org.stratoemu.strato.databinding.AppDialogBinding
 import org.stratoemu.strato.loader.LoaderResult
 import org.stratoemu.strato.settings.SettingsActivity
+import org.stratoemu.strato.utils.CacheManagementUtils
 import org.stratoemu.strato.utils.SaveManagementUtils
 import org.stratoemu.strato.utils.serializable
+import java.io.File
 
 /**
  * This dialog is used to show extra game metadata and provide extra options such as pinning the game to the home screen
@@ -127,14 +129,29 @@ class AppDialog : BottomSheetDialogFragment() {
             AlertDialog.Builder(requireContext())
                 .setTitle(getString(R.string.delete_save_confirmation_message))
                 .setMessage(getString(R.string.action_irreversible))
-                .setNegativeButton(getString(R.string.no), null)
-                .setPositiveButton(getString(R.string.yes)) { _, _ ->
+                .setNegativeButton(getString(R.string.cancel), null)
+                .setPositiveButton(getString(android.R.string.ok)) { _, _ ->
                     SaveManagementUtils.deleteSaveFile(item.titleId)
                     binding.deleteSave.isEnabled = false
                     binding.exportSave.isEnabled = false
                 }.show()
         }
 
+        val cacheExists = CacheManagementUtils.pipelineCacheExists(item.titleId!!)
+
+        binding.cacheDelete.isEnabled = cacheExists
+        binding.cacheDelete.setOnClickListener {
+            AlertDialog.Builder(requireContext())
+                .setTitle(getString(R.string.delete_shader_cache_confirmation_message))
+                .setMessage(getString(R.string.action_irreversible))
+                .setNegativeButton(getString(R.string.cancel), null)
+                .setPositiveButton(getString(android.R.string.ok)) { _, _ ->
+                    if(CacheManagementUtils.deleteCacheFile(item.titleId!!)) {
+                        binding.cacheDelete.isEnabled = false
+                    }
+                }.show()
+        }
+
         binding.importSave.setOnClickListener {
             SaveManagementUtils.importSave(documentPicker)
         }

app/src/main/java/org/stratoemu/strato/utils/CacheManagementUtils.kt

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright © 2024 Strato Team and Contributors (https://github.com/strato-emu/)
+ */
+
+package org.stratoemu.strato.utils
+
+import org.stratoemu.strato.StratoApplication
+import org.stratoemu.strato.getPublicFilesDir
+import java.io.File
+
+class CacheManagementUtils {
+
+    companion object {
+        private val cacheFolderRoot by lazy { "${StratoApplication.instance.getPublicFilesDir().canonicalPath}/graphics_pipeline_cache/" }
+
+        fun pipelineCacheExists(titleId: String) : Boolean {
+            val cacheFolderPath = cacheFolderRoot + titleId
+            val cacheFolderPathExt = "$cacheFolderRoot$titleId.staging"
+
+            return File(cacheFolderPath).exists() && File(cacheFolderPathExt).exists()
+        }
+
+        /**
+         * Deletes the cache files for a given game.
+         */
+        fun deleteCacheFile(titleId : String) : Boolean {
+            return File("${cacheFolderRoot}$titleId").delete()
+                    && File("${cacheFolderRoot}$titleId.staging").delete()
+        }
+    }
+}

app/src/main/res/layout/app_dialog.xml

@@ -148,7 +148,6 @@
             android:layout_marginTop="8dp"
             app:alignItems="center"
             app:flexWrap="nowrap"
-            app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/save_management"
@@ -185,5 +184,39 @@
                 app:iconGravity="textStart" />
 
         </com.google.android.flexbox.FlexboxLayout>
+
+        <TextView
+            android:id="@+id/delete_pipeline_cache"
+            style="?attr/textAppearanceLabelLarge"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/manage_shader_cache"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/flexboxSaves" />
+
+        <com.google.android.flexbox.FlexboxLayout
+            android:id="@+id/flexboxCache"
+            style="@style/ThemeOverlay.Material3.Button.IconButton.Filled.Tonal"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            app:alignItems="center"
+            app:flexWrap="nowrap"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/delete_pipeline_cache"
+            app:layout_constraintVertical_bias="1">
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/cache_delete"
+                style="@style/Widget.Material3.Button.TonalButton.Icon"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:contentDescription="@string/clear_shader_cache"
+                android:text="@string/clear_shader_cache"
+                app:icon="@drawable/ic_delete" />
+
+        </com.google.android.flexbox.FlexboxLayout>
     </androidx.constraintlayout.widget.ConstraintLayout>
 </LinearLayout>

app/src/main/res/values/strings.xml

@@ -304,6 +304,9 @@
     <string name="save_data_found">Save data found. What would you like to do?</string>
     <string name="save_data_not_found">No save data found. What would you like to do?</string>
     <string name="delete_save_confirmation_message">Are you sure you want to delete this save?</string>
+    <string name="delete_shader_cache_confirmation_message">Are you sure you want to delete all cached shaders?</string>
+    <string name="manage_shader_cache">Manage shader cache</string>
+    <string name="clear_shader_cache">Clear shader cache</string>
     <string name="action_irreversible">This action is irreversible</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>